In his arguments in brown vs board of education, the lawyer for linda brown claimed that supersets but equal public school were

 NOT EQUAL

Historical context:

Brown v. The Board of Education (1954) overturned an older Supreme Court decision in Plessy v. Ferguson (1896), which had said that segregation laws were acceptable as long as equal facilities were available.  Brown v. The Board of Education asserted that separate educational facilities are inherently unequal and therefore the "separate but equal" policy was unconstitutional.  The decision in Brown v. the Board of Education mandated an end to segregation in education.

d

explanation:

the soviet union wanted to impose communist governments in eastern europe.